Question

Amongst the elements with following electronic
configurations, which one of them may have the highest
ionization energy?
(a) Ne[3s²3p²] (b) Ar [3d¹⁰4s²4p³ ]
(c) Ne [3s²3p¹] (d) Ne [3s²3p³]

Answer 1

The element having highest ionization energy is Ne [3s²3p³].

Option (D) is correct.

Explanation:

• The elements having half-filled and fully filled orbitals in electronic configuration has more ionisation energy than the value observed in trends.  In [Ne] 3.s^2, 3.p^3 orbital is half-filled.
• Outermost electronic configuration is 3.s^2, 3.p^3
• So it has highest ionisation energy.

Thus the element having highest ionization energy is Ne [3s²3p³].

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